Representation systems are those in which seats in the legislature are allocated according to each political party's share of the popular vote.

Proportional representation systems are those in which seats in the legislature are allocated according to each political party's share of the popular vote.

Explanation:

The proportional electoral system is one of the varieties of electoral systems used in elections to representative bodies. During elections by proportional system, deputy mandates are distributed between the lists of candidates in proportion to the votes cast for each of the lists of candidates.

battle of saint-mihiel, (12–16 september 1918), allied victory and the first u.s.-led offensive in world war i. the allied attack against the saint-mihiel salient provided the americans with an opportunity to use their forces on the western front en masse.

explanation:

answer; /// i do believe that the correct answer is (a); a farming tribe that settled primarily along the mississippi and arkansas rivers;